The Supreme Court has turned away a challenge to President Obama's policy of expanding government-funded research using embryonic stem cells that scientists say may offer hope for new treatments for spinal injuries and Parkinson's disease.

The court's action brings a quiet end to a lawsuit that briefly threatened to derail all funding for such research.

A federal judge in Washington in 2010 ordered the National Institutes of Health to halt funding of the research, citing a long-standing congressional ban on spending for research in which "human embryos are destroyed."

But an appeals court overturned that order and ruled last year that the ban applied only to research that destroyed human embryos so as to obtain stem cells.

President George W. Bush in 2001 had allowed limited research on several stem cell lines that were already in existence. Upon taking office in 2009, Obama went further and said NIH could conduct "scientifically worthy human stem cell research to the extent permitted by law." Under guidelines issued by NIH, researchers can used stem line cells derived from donated frozen embryos that are no longer needed for fertility treatments.

--David G. Savage, Tribune Washington Bureau (MCT)